Size and weight are big decision factors when you are trying to find the ideal camera for your needs.
In this section, we are going to illustrate the Panasonic ZS7 and Panasonic LZ20 side-by-side from the front, back and top in their relative dimensions. Panasonic ZS7 has external dimensions of 103 x 60 x 33 mm (4.06 x 2.36 x 1.3″) and weighs 218 g (0.48 lb / 7.69 oz) (including batteries). Panasonic LZ20 has external dimensions of 120 x 76 x 80 mm (4.72 x 2.99 x 3.15″) and weighs 499 g (1.10 lb / 17.60 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic ZS7 and the Panasonic LZ20. Panasonic ZS7 is clearly the smaller of the two cameras. Its body is 17mm narrower, 16mm shorter and 47mm thinner than Panasonic LZ20.
Here is the back view size comparison of the Panasonic ZS7 and Panasonic LZ20.
Now lets look at the top view comparison of Panasonic ZS7 and Panasonic LZ20.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic ZS7 is significantly lighter (281g ) than the Panasonic LZ20 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Panasonic Lumix DMC-ZS7 (Lumix DMC-TZ10) nor Panasonic Lumix DMC-LZ20 provides any type of weather sealing in their bodies, so you have to give extra care especially when you are shooting outdoors. If weather sealing is a must-have feature for you, check these sections: Top Compact Cameras with Weather Sealing Top Bridge Cameras with Weather Sealing
LCD Screen Size and Features
Panasonic ZS7 and Panasonic LZ20's LCD screens have the same diagonal size of 3.00 inches.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.